It is the duty of each owner to provide for the sanitary disposal of all refuse accumulating on the owner’s premises before it becomes a nuisance.  Any such accumulation remaining on any premises for a period of more than thirty (30) days shall be deemed a nuisance and the City may proceed to abate such nuisances in accordance with the provisions of Chapter 50 of this Code of Ordinances or by initiating proper action in district court.
(Code of Iowa, Ch. 657)